4. NAVDORM

Question 1

reference

Answer 1

Ch 1: Introduction
Ch 2: Duties and Responsibilities
Ch 3: Standard Policies, Requirements and Procedures

Question 2

DFGMC cal

Answer 2

‘Ships with a DFGMC
are required to conduct an intentional compass calibration
within 24 hours of conducting any special evolution

Question 3

6 rules of DR

Answer 3

(a) Plot a DR position at least every hour on the
hour while in open ocean.
(b) Plot a DR position at every course change.
(c) Plot a DR position at every speed change.
(d) Plot a DR position when obtaining a fix or
running fix.
(e) Plot a DR position when obtaining a single line
of position.
(f) Label each fix with course, speed, and time. Draw
a new course line from each fix or running fix as soon as it has been determined and plotted on the chart. This is accomplished whether the ship is on track or not. The DR plot should cover at least the next two fix intervals; ECDIS-N generates this automatically but the display must be properly set up, see Appendix J.

Question 4

minimum fix prescedence

Answer 4

(1) The minimum fix precedence is:
Open Ocean: GPS, visual/radar/composite, INS, RTS
Coastal: GPS, visual/radar/composite
Restricted: GPS, visual/radar/composite
Piloting: GPS, visual/radar/composite

Question 5

Fix guidlines for restricted waters

Answer 5

less than 2 miles
fom 2
3 min

Question 6

piloting waters

Answer 6

2 to 10 NM
fom 4
3 to 15

Question 7

coastal water

Answer 7

10 to 30
FOM 6
15 to 30

Question 8

Open Ocean

Answer 8

over 30 NM
FOM 7
30 min plus

Question 9

fix accuracy for FOM 2, 4, 6, 10

Answer 9

2 - 50
4 - 100
6 - 500
10 - 1500